257437-5

View detailed technical data, stock status, and sourcing information for: 257437-5
DODParts.com distributes related products varnishes dopes paints, aircraft parts and consumables, electrical parts, fittings and other components for the aerospace and defense industries. Submit the short price quote form for part 257437-5 to receive an up to date pricing and availability quote by email.

Federal Supply Group

Hardware and Abrasives

Federal Supply Classification

5331 O-Ring

National Stock Number

5331-00-418-2151

Item Name Code

47946

Assigment Date

11/20/1970 (55 years ago)

A washer having a centrally located hole with a solid or laminated cross-section and two flat parallel bearing surfaces. The hole must be 75 percent or less than the largest dimension and the bearing surface finish is greater than 32 microinch (0.8 micrometer). The thickness cannot exceed 25 percent of the largest outside dimension. When the largest outside dimension is less than 1/4 inch or 6mm, the thickness must be 0.006 inches (0.15mm) or greater and for items 1/4 inch (6mm) or larger, the thickness must be 0.016 inches (0.4mm) or greater. The maximum tolerance is applied to dimensions and used as a determining factor. Items with separable lamination use shim. For items fabricated from ceramic or electrically rated materials by specification or industry standards use insulator (1), washer. Excludes:disk, valve, graphite impregnated and lubricated items.

1.233 inches minimum and 1.245 inches maximum center hole diameter, 70.0 shore durometer a nominal hardness rating, 0.067 inches minimum and 0.073 inches maximum cross-sectional height, rubber butadiene-acrylonitrile class nbr material

Product Characteristics

Below you’ll find the complete technical specifications and performance data for this part, including material details and compliance information.

Cross-Sectional Height: 0.067 inches minimum and 0.073 inches maximum
Center Hole Diameter: 1.233 inches minimum and 1.245 inches maximum
Hardness Rating: 70.0 shore durometer a nominal
Material: rubber butadiene-acrylonitrile class nbr

Related Parts

This NSN group includes multiple components designed to meet specific performance and operational standards. Each listing provides detailed specs, functionality data, and replacement compatibility information:

Part Number	Name
257437-5	O-Ring
31.47X1.78 20A7	O-Ring
9452K113	O-Ring
N219-1-239-070-70DUR	O-Ring

FAQs

Find helpful answers about installation, operation, maintenance, compliance, and troubleshooting.

What is the FSCG of the NSN 5331-00-418-2151?

The FSCG of the NSN 5331-00-418-2151 is 5331

Does the NSN 5331-00-418-2151 have a Schedule B code assigned?

Yes, the Schedule B code is 4016930000

Does NSN 5331-00-418-2151 require demilitarization?

Items subject to the export administration regulations (ear) in parts 730-774 of title 15, code of federal regulations (cfr) (ccli or ear99) and determined by dod to present a low risk when released out of dod control. No demil, mut, or end use certificate is required. May require an export licensefrom doc.

Does NSN 5331-00-418-2151 contain precious materials?

Item does not contain precious metal.

Does NSN 5331-00-418-2151 contain hazardous materials?

Indicates there is no data in the hmirs and the nsn is in a fsc not generally suspected of containing hazardous materials.

When the NSN 5331-00-418-2151 was assigned to the Federal Catalog?

It was assigned 55 years ago, on Fri, Nov 20, 1970